From f1a80770e1f18af2b3d55700d0edbfdd89f7edf5 Mon Sep 17 00:00:00 2001
From: FishyClockwork <fcwgit@hotmail.com>
Date: Fri, 28 Oct 2016 13:43:46 +0200
Subject: [PATCH] Updated the USDF specs

Updated the USDF specs about 'require' and 'exclude'.
---
 specs/usdf.txt       | 20 ++++++++++++++++++++
 specs/usdf_zdoom.txt | 10 ++++++++++
 2 files changed, 30 insertions(+)

diff --git a/specs/usdf.txt b/specs/usdf.txt
index 093c9e7d7..2c65f25d0 100644
--- a/specs/usdf.txt
+++ b/specs/usdf.txt
@@ -122,6 +122,26 @@ conversation // Starts a dialog.
                 amount = <integer>; // Minimum amount of the item needed.
             }
 
+            // The amount of an item needed for this option to become available.
+            // You can have as many as needed. All require blocks must be satisfied
+            // to show this option.
+            require
+            {
+                item   = <integer>; // Item that is required to show this option.
+                amount = <integer>; // Minimum amount of the item needed.
+            }
+
+            // The undesired amount of an item. This option will become available
+            // if you have less than the specified amount. You can have as many
+            // as needed. All exclude blocks must be satisfied to show this option.
+            // Note: if both require and exclude are defined then all require
+            // and all exclude blocks must be satisfied to show this option.
+            exclude
+            {
+                item   = <integer>; // Item that is unwanted to show this option.
+                amount = <integer>; // Unwanted minimum amount of the item.
+            }
+
             displaycost     = <bool>;    // Whether the cost should be
                                          // displayed with the option.
                                          // If no cost is specified this should
diff --git a/specs/usdf_zdoom.txt b/specs/usdf_zdoom.txt
index c106cdd1a..8a324c088 100644
--- a/specs/usdf_zdoom.txt
+++ b/specs/usdf_zdoom.txt
@@ -50,6 +50,16 @@ conversation
                 item   = <string>;
             }
 
+            require
+            {
+                item   = <string>;
+            }
+
+            exclude
+            {
+                item   = <string>;
+            }
+
             giveitem        = <string>;
         }
     }